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Commitments - Schedule of Activity Related to HMBS Repurchases (Footnote) (Details) - Maximum Claim Amount $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) loan
Long-term Purchase Commitment [Line Items]
Number of maximum claim amount repurchases loans | loan	423
Amount of maximum claim amount repurchases | $	$ 95.3

X

- Definition

This represents the amount of maximum claim amounts repurchased.

+ References

No definition available.

+ Details

Name:	ocn_AmountOfMaximumClaimAmountRepurchases
Namespace Prefix:	ocn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

This represents the number of maximum claim amounts repurchased.

+ References

No definition available.

+ Details

Name:	ocn_NumberOfMaximumClaimAmountRepurchasesLoans
Namespace Prefix:	ocn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ocn_MaximumClaimAmountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: